President of the All-India Anti-Terrorist Front Maninderjit Singh Bitta said it is extremely imperative for the government to find out the culprits behind the act and bring them to book.

Bitta suspected that this was the act of disgruntled elements, operating under the influence of some foreign agency, to defame the Sikh community.

All cinema halls in Delhi, Ghaziabad and Noida have been evacuated as a precautionary measure and night shows there have been cancelled.

A high alert was sounded across Delhi, particularly in cinema halls, following the explosions, police sources said.

The film was withdrawn from all theatres across Punjab last week following violent protests from Shiromani Gurdwara Prabandhak Committee, the supreme body managing Sikh shrines in Punjab and some other parts of the country.